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Reconstruction of The First Mammal's Genome Suggests It Had 38 Chromosomes - ScienceAlert

Reconstruction of The First Mammal's Genome Suggests It Had 38 Chromosomes - ScienceAlert

Reconstruction of The First Mammal's Genome Suggests It Had 38 Chromosomes - ScienceAlert
Oct 05, 2022 34 secs

Scientists don't know much about what the very first mammal looked like, but they do know that it lived around 180-250 million years ago and that every mammal on Earth – from blue whales to platypuses – is descended from it.

An international team of scientists has computationally pieced together a likely genome for the common ancestor of mammals by working backward from 32 genomes of living species.

The researchers reconstructed the complete set of chromosomes at 16 nodes stretching back to the common ancestor of all mammals.

Fossils found in Africa and North America are too specialized to be a common ancestor of all mammals, but they would have lived around the same time as the first mammal species.

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